i'm from thailand i used vaio c14sp and i installed ideneb leopard 10.5.8 but my wireless lan, Ethernet and some problem with my graphic card

my device is

Marvell Yukon 88E8036 PCI-E Fast Ethernet Controller
Intel(R) PRO/Wireless 3945BG Network Connection

and Nvidia geforce go 7400 (256MB) it's worked but have a problem when i want to used imovie this programme prompt message "your graphic card not support Quartz extreme" what can i do?

so please anyone can help me?